I have an old Sears 1/2hp convertible jet pump with 20 gallon pressure tank. It is connected to a hand dug 30ft deep 36" diameter well. The depth of water is about 16ft from the bottom of the well. The pump just went out a couple of days ago lucky we don't live there yet well be moving in in about a month and am looking for suggestions on a replacement pump and tank system. Should I replace with jet pump or submersible? Also I have been looking at installing constant pressure valve seems like a good idea. Any suggestions would be greatly appreciated.